<template>
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      autocomplete="on"
      label-position="left"
    >
      <div class="title-container">
        <h3 class="title">用户管理后台</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon name="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          name="username"
          type="text"
          autocomplete="on"
          placeholder="用户账号"
          maxlength="11"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon name="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="用户密码"
          name="password"
          autocomplete="on"
          @keyup.enter.native="handleLogin"
          maxlength="11"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :name="passwordType === 'password' ? 'eye-off' : 'eye-on'" />
        </span>
      </el-form-item>

      <el-button
        :loading="loading"
        type="primary"
        style="width: 100%; margin-bottom: 30px"
        @click.native.prevent="handleLogin"
      >
        登录
      </el-button>

      <div style="position: relative">
        <div class="tips">
          <span>用户名长度: 5-11位</span>
          <span>密码长度: 5-11位</span>
        </div>
      </div>
    </el-form>
  </div>
</template>
<script lang="ts">
import { Component, Vue, Watch } from 'vue-property-decorator';
import { Route } from 'vue-router';
import { Dictionary } from 'vue-router/types/router';
import { Form as ElForm, Input } from 'element-ui';
import { ManagerModule } from '@/store/modules/manager';
import { isValidUsername } from '@/utils/validate';
import config from '@/utils/config';
import { getItem } from '@/utils/cookies';
@Component({
  name: 'Login'
})
export default class extends Vue {
  data() {
    return {
      title: config.title
    };
  }
  validateUsername = (rule: any, value: string, callback: Function) => {
    if (!isValidUsername(value)) {
      callback(new Error('账号的长度不正确'));
    } else {
      callback();
    }
  };

  validatePassword = (rule: any, value: string, callback: Function) => {
    if (value.length < 5 || value.length > 11) {
      callback(new Error('密码的位数不正确'));
    } else {
      callback();
    }
  };

  loginForm = {
    username: getItem('account') || '',
    password: ''
  };

  loginRules = {
    username: [{ validator: this.validateUsername, trigger: 'blur' }],
    password: [{ validator: this.validatePassword, trigger: 'blur' }]
  };
  passwordType = 'password';
  loading = false;
  showDialog = false;
  redirect?: string;
  otherQuery: Dictionary<string> = {};
  @Watch('$route', { immediate: true })
  onRouteChange(route: Route) {
    const query = route.query as Dictionary<string>;
    if (query) {
      this.redirect = query.redirect;
      this.otherQuery = this.getOtherQuery(query);
    }
  }

  mounted() {
    if (this.loginForm.username === '') {
      (this.$refs.username as Input).focus();
    } else if (this.loginForm.password === '') {
      (this.$refs.password as Input).focus();
    }
  }

  showPwd() {
    if (this.passwordType === 'password') {
      this.passwordType = '';
    } else {
      this.passwordType = 'password';
    }
    this.$nextTick(() => {
      (this.$refs.password as Input).focus();
    });
  }

  handleLogin() {
    (this.$refs.loginForm as ElForm).validate(async (valid: boolean) => {
      if (valid) {
        this.loading = true;
        const ret = await ManagerModule.Login(this.loginForm);
        if (ret.status) {
          this.loading = false;
          this.$router.push({
            path: this.redirect || '/',
            query: this.otherQuery
          });
          return;
        }
        setTimeout(() => {
          this.loading = false;
        }, 500);
        this.$msgErr(ret?.msg || '登录失败');
        // Just to simulate the time of the request
      } else {
        return false;
      }
    });
  }

  getOtherQuery(query: Dictionary<string>) {
    return Object.keys(query).reduce((acc, cur) => {
      if (cur !== 'redirect') {
        acc[cur] = query[cur];
      }
      return acc;
    }, {} as Dictionary<string>);
  }
}
</script>

<style lang="scss">
// References: https://www.zhangxinxu.com/wordpress/2018/01/css-caret-color-first-line/
@supports (-webkit-mask: none) and (not (cater-color: $loginCursorColor)) {
  .login-container .el-input {
    input {
      color: $loginCursorColor;
    }

    input::first-line {
      color: $lightGray;
    }
  }
}

.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      height: 47px;
      background: transparent;
      border: 0px;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $lightGray;
      caret-color: $loginCursorColor;
      -webkit-appearance: none;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $loginBg inset !important;
        -webkit-text-fill-color: #fff !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
.login-container {
  height: 100%;
  width: 100%;
  overflow: hidden;
  background-color: $loginBg;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $darkGray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $lightGray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $darkGray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
